<?php
header('Content-type:text/html;charset=utf-8');
/**
 * 后台交易 HttpClient通信
 * @param unknown_type $params
 * @param unknown_type $url
 * @return mixed
 */
function sendHttpRequest($params, $url)
{

    $opts = getRequestParamString($params);

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);//不验证证书
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);//不验证HOST
    curl_setopt($ch, CURLOPT_SSLVERSION, 3);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-type:application/x-www-form-urlencoded;charset=UTF-8'
    ));
    curl_setopt($ch, CURLOPT_POSTFIELDS, $opts);

    /**
     * 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
     */
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    // 运行cURL，请求网页
    $html = curl_exec($ch);
    // close cURL resource, and free up system resources
    curl_close($ch);
    return $html;
}

/**
 * 组装报文
 *
 * @param unknown_type $params
 * @return string
 */
function getRequestParamString($params)
{
    return http_build_query($params);
}